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Started blinking and the red light blinking now and no tv screen when i turn on just blinking red power light

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The blinking light is a self-test diagnostic. If you can tell me how many times it blinks in between each pause and what is the make/model of the tv, I can tell you whats the source of the problem.

Posted on Mar 27, 2011

  • 5 more comments 
  • simmerxp Mar 27, 2011

    I have an Insignia ns-lcd19 when plugged in the amber flashes 3-3(pattern of flashes keep changing) When powered on the led turns green ,back light flashes then power led shuts off,then amber led flashes 4-4 (pattern also changes) caps and fuses appear good . When plugged in I am getting the 5v and 12v -both drop when powered on about the time backlight comes on) and voltages recover. Any ideas?

  • simmerxp Mar 27, 2011

    Touched up solder joints on x-formers and inverters now when plugged in amber light flashes then stays amber. when powered, led turns on and stays green ,back light turns on for 3 seconds off about 8-10 and cycles until power is turned off. Then amber led flashes.

  • eagle338
    eagle338 Mar 27, 2011

    Since the voltages are there when the set is off, my money would be on the short protect circuits. The 12V line is the one that goes to the backlight inverter. So my first question to you would be did you check for shorted or burnt components anything that can cause an open circuit?

  • simmerxp Mar 30, 2011

    I have checked parts on the power supply in circuit . I may have to start pulling some caps but I do not have an esr tester. It does make humming noise in the area of 6 caps , D911,D909 and D908 when the back light comes on( screen is grey when on). I don't see any visual bad parts on either board .

  • simmerxp Mar 30, 2011

    P.S. is working fine now. Have 12v ,5V, 3V, and 3V.Still have flashing amber led when plugged in or shut off.When powered on the led turns green and the screen is white ,no picture but it has sound.Only 2 boards , T-con must be on main board. only 5 leaded caps on M.B. the rest are SMD . I checked some parts where the cable plugs in from the panel. did not find anything yet. Any ideas?

  • eagle338
    eagle338 Mar 31, 2011

    Well you can test the caps with an ohm-meter too. But if there's no sings of damage on the caps(such as bulging or cracking at the tops) then the caps are out of question. Here's a guide. Do not short the leads like he suggests though sometimes the caps will explode. It will be better just to touch the two contacts of a bulb on the leads of a capacitor to discharge the voltage into the bulb(which glows momentarily and turns off)

  • simmerxp Apr 02, 2011

    T-con board on back of panel. fuse is good and have 4.1V at fuse.



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